Class to hold values from field grammar parser. More...

#include <MSSpwParse.h>

Inheritance diagram for casa::MSSpwParse:

Public Member Functions
	MSSpwParse ()
	Default constructor.
	MSSpwParse (const MeasurementSet *ms)
	~MSSpwParse() {if (node_p) delete node_p;node_p=0x0;};
	MSSpwParse (const MSSpectralWindow &spwSubTable, const MSDataDescription &ddSubTable, const TableExprNode &columnAsTEN)
	~MSSpwParse ()
const TableExprNode *	selectSpwIdsFromIDList (const Vector< Int > &spwIds, const Bool addTen=True, const Bool addIDs=True)
const TableExprNode *	selectSpwIdsFromFreqList (const Vector< Float > &spwIds, const Float factor)
void	selectChannelsFromIDList (Vector< Int > &spwIds, Vector< Int > &chanIDList, Int nFSpec)
void	selectChannelsFromDefaultList (Vector< Int > &spwIds, Vector< Int > &chanDefaultList)
const TableExprNode *	endOfCeremony (const TableExprNode &ten)
MSSpectralWindow &	subTable ()
Static Public Member Functions
static const TableExprNode *	node ()
	const TableExprNode *selectSpwOrSource(const String& fieldName);
static Vector< Int >	selectedIDs ()
static Matrix< Int >	selectedChanIDs ()
static void	reset ()
static void	cleanup ()
Static Public Attributes
static MSSpwParse *	thisMSSParser
Private Attributes
MSSpectralWindow	spwSubTable_p
MSDataDescription	ddSubTable_p
Static Private Attributes
static TableExprNode *	node_p
static Vector< Int >	idList
static Matrix< Int >	chanList
static TableExprNode	columnAsTEN_p

Detailed Description

Class to hold values from field grammar parser.

Intended use:

Internal

Etymology

MSSpwParse is the class used to parse a spectral window selection command.

Synopsis

MSSpwParse is used by the parser of spectral window (Spw) sub-expression statements. The parser is written in Bison and Flex in files MSSpwGram.y and .l. The statements in there use the routines in this file to act upon a reduced rule. Since multiple tables can be given (with a shorthand), the table names are stored in a list. The variable names can be qualified by the table name and will be looked up in the appropriate table.

The class MSSpwParse only contains information about a table used in the table command. Global variables (like a list and a vector) are used in MSSpwParse.cc to hold further information.

Global functions are used to operate on the information. The main function is the global function msSpwCommand. It executes the given STaQL command and returns the resulting ms. This is, in fact, the only function to be used by a user.

Motivation

It is necessary to be able to give a ms command in ASCII. This can be used in a CLI or in the table browser to get a subset of a table or to sort a table.

Definition at line 86 of file MSSpwParse.h.